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From |
"Daniel Sepulveda-Adams" <sepul003@umn.edu> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: RE: RE: Question erase duplicates values |

Date |
Tue, 12 Aug 2008 12:42:00 -0500 |

Nick Sorry that I was not very precise & I understand your explanation, let see if I can be more precise. EX: ID ndc units1 units2 units3 ---------------------------------------- 1 1 5 6 7 1 1 4 8 9 2 2 7 8 6 2 2 8 2 1 3 3 1 4 6 3 3 4 6 8 What I need is ID ndc units1 units2 units3 ---------------------------------------- 1 1 5 6 7 . 1 4 8 9 2 2 7 8 6 . 2 8 2 1 3 3 1 4 6 . 3 4 6 8 The command that I used was Duplicates drop ID, but that drop all the observations that were duplicates not just the duplicates values in the variables ID Let me know if that helps to understand my problem. Best regards --- Daniel A. Sepulveda Adams Research Scientist - PRIME Institute College of Pharmacy - University of Minnesota 308 Harvard ST SE, Weaver Densford Hall, 7-159 Minneapolis, MN, 55455, USA Phone: 612-624-8489 Cell Phone: 651-295-7771 Fax: 612-625-9931 Email: sepul003@umn.edu -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox Sent: Tuesday, August 12, 2008 12:11 PM To: statalist@hsphsun2.harvard.edu Subject: st: RE: Question erase duplicates values There is no code here and no example data to be clear on what you tried. So, how can anyone answer this except by guessing? The fact that values of an identifier are repeated does not mean that the dataset should be cleaned up by removing duplicates of the identifier. That principle would wreak havoc on panel data. Cloning the identifier makes no difference to that principle. What is true of the original is true of the clone, necessarily. Perhaps you did something like . duplicates drop clonedid And -duplicates- refused. I am very pleased to hear that. I designed that behaviour into -duplicates- to protect people from losing information. Perhaps you did something else altogether, in which case please say precisely what. Nick n.j.cox@durham.ac.uk Daniel Sepulveda-Adams I'm trying to created a unique ID to make a merge between two date set But the Unique ID is a variable that have many duplicates values, therefore what I did was clone the variables and try to erase the duplicates values but just in the NEW variable but I was not able to do that. Anyone has an idea how to do that? Thank you for your time. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: RE: RE: Question erase duplicates values***From:*"Sergiy Radyakin" <serjradyakin@gmail.com>

**st: RE: RE: RE: Question erase duplicates values***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

**References**:**st: Question erase duplicates values***From:*"Daniel Sepulveda-Adams" <sepul003@umn.edu>

**st: RE: Question erase duplicates values***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

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